Question

A ball with a mass of 550 g is moving straight up with a speed of 19 m/s, when it hits Tinkerbell who is hovering motionless directly above the ball. Tinkerbell grabs the ball, quits flapping her wings, and rides on the ball until it reaches its maximum height. If Tinkerbell has a mass of 820 g, how high abver Tinkerbell's original position does she and the ball rise, neglecting air resistance?